Somewhere in Poser's code, there seems an inherent limit to objects' 'surface brightness'. Would be useful to know what it is, and have an option to change.

As things stand, beyond the comparative simplicity of  'super-ambience' hack, becomes horribly complicated to get 'emission' bright, even if still not bright enough...

At least 'displacement' limit may be changed !! ( Finding that option turned my imported 'lawn' into 'Elephant grass' !!)

Huh: I remember when we used to craft custom Poser lights and parent them within luminaires...

Could that be a clue ? Lights seem to have no upper limit on brightness ...

Hmm...

Tangential, I sorta fell into Poser via cover-disk P3 then ($$) P4 as a way to put posable figures into sub-scenes from the sprawling Medieval-ish sets I was crafting in IMSI's classic 'Floorplan 3D'. I made lots of 3DS arches and such in the bundled TurboCAD, serendipitously figured how to make wall-cutting props. The arcane, un-documented attribute I found flagged those to auto-dock into FP walls, rather than just collide. Sadly, IMSI had licensed FP's core code, fell out with its developers when FP needed re-compiling for  ?x32. So, IMSI licensed new core-code with different UI and internals. The 'New, Improved' FP was very nice, but had a totally different work-flow. Worse, apparently for legal reasons, it was incompatible with the old FP file formats, could not port my plans or use my custom wall-cutters. I was bereft...